From a03d9f05e4a9f94563f3a9adf502086290e91629 Mon Sep 17 00:00:00 2001
From: Jef LeCompte <jeffreylec@gmail.com>
Date: Wed, 29 Jun 2022 12:28:21 -0700
Subject: [PATCH] test: add node-version-file test

---
 __tests__/data/package.json | 11 +++++++++++
 __tests__/installer.test.ts | 21 +++++++++++++++++++++
 2 files changed, 32 insertions(+)
 create mode 100644 __tests__/data/package.json

diff --git a/__tests__/data/package.json b/__tests__/data/package.json
new file mode 100644
index 00000000..9fdc65e0
--- /dev/null
+++ b/__tests__/data/package.json
@@ -0,0 +1,11 @@
+{
+  "name": "test",
+  "version": "1.0.0",
+  "private": true,
+  "scripts": {
+    "test": "echo test"
+  },
+  "volta": {
+    "node": "16.15.1"
+  }
+}
diff --git a/__tests__/installer.test.ts b/__tests__/installer.test.ts
index 5a3ad553..5f72690d 100644
--- a/__tests__/installer.test.ts
+++ b/__tests__/installer.test.ts
@@ -584,6 +584,27 @@ describe('setup-node', () => {
       );
     });
 
+    it('reads node-version-file if provided with volta', async () => {
+      // Arrange
+      const expectedVersionSpec = '16.15.1';
+      const versionFile = 'package.json';
+      process.env['GITHUB_WORKSPACE'] = path.join(__dirname, 'data');
+      inputs['node-version-file'] = 'volta';
+
+      existsSpy.mockImplementationOnce(
+          input => input === path.join(__dirname, 'data', versionFile)
+      );
+      // Act
+      await main.run();
+
+      // Assert
+      expect(existsSpy).toHaveBeenCalledTimes(1);
+      expect(existsSpy).toHaveReturnedWith(true);
+      expect(logSpy).toHaveBeenCalledWith(
+          `Resolved ${versionFile} as ${expectedVersionSpec}`
+      );
+    });
+
     it('both node-version-file and node-version are provided', async () => {
       inputs['node-version'] = '12';
       const versionSpec = 'v14';